Nucleoside H-Phosphonates. 15. Preparation of Nucleoside H-Phosphonothioate Monoesters from the Corresponding Nucleoside H-Phosphonates
摘要:
A convenient method for the preparation of nucleoside 3'-H-phosphonothioate monoesters from suitably protected nucleoside 3'-H-phosphonates has been developed. It consists of activation of nucleoside H-phosphonates with pivaloyl chloride in the presence of a limited amount of a base followed by treatment with 1,1,1,3,3,3-hexamethyldisilathiane (HMDST).